People often come to visit /r/bahai (Reddit’s Bahá’í group) to ask questions. Every now and then, people drop by with the question: “Where do I start learning about the Bahá’í Faith?”. Here’s my answer to a recent thread, specifically asking for books to read to get a good overview of the Bahá’í Faith.
A good place to start if you’re looking for Baha’i books is the Baha’i Reference Library, which has a number of authoritative Baha’i texts. You can also find all of these for purchase at the Baha’i Bookstore online, and for free in e-book form.
The order you read them in kind of depends on your own background and what you’re interested in, but a good place to start is with Bahá’u’lláh’s Hidden Words, which is like a distillation of the spiritual teachings that lie at the core of all of the world’s great religions.
If you have a strong mystical bent, you might want to follow that up with Bahá’u’lláh’s Seven Valleys and Four Valleys, or Gems of Divine Mysteries. Both of these are essentially letters to individuals who had asked about certain spiritual truths, such as the path taken by a soul on its spiritual journey.
If you’re really interested in Bahá’u’lláh’s teachings on the evolution of religion throughout history, and His interpretation of past religious prophecies, you should definitely read the Book of Certitude, aka the Kitáb-i-Íqán. I’ve known a lot of people who’ve started learning about the Bahá’í Faith through this book; it really delivers some penetrating spiritual insights.
There are also more general introductory books about the Bahá’í Faith that are available. Two commonly recommended books for those interested in reading about the Bahá’í Faith are A Short History of the Bahá’í Faith by Peter Smith, and A Short Introduction to the Bahá’í Faith by Moojan Momen. If you want a very quick foretaste of both books, you can check out this combined review. Smith has also published a newer book, An Introduction to the Baha’i Faith, which you might want to consider as well.